This is a note to let you know that I've just added the patch titled
net/mlx4_en: Don't attempt to TX offload the outer UDP checksum for VXLAN
to the 3.17-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-mlx4_en-don-t-attempt-to-tx-offload-the-outer-udp-checksum-for-vxlan.patch
and it can be found in the queue-3.17 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Fri Nov 7 11:36:50 PST 2014
From: Or Gerlitz <ogerlitz@xxxxxxxxxxxx>
Date: Thu, 30 Oct 2014 15:59:27 +0200
Subject: net/mlx4_en: Don't attempt to TX offload the outer UDP checksum for VXLAN
From: Or Gerlitz <ogerlitz@xxxxxxxxxxxx>
[ Upstream commit a4f2dacbf2a5045e34b98a35d9a3857800f25a7b ]
For VXLAN/NVGRE encapsulation, the current HW doesn't support offloading
both the outer UDP TX checksum and the inner TCP/UDP TX checksum.
The driver doesn't advertize SKB_GSO_UDP_TUNNEL_CSUM, however we are wrongly
telling the HW to offload the outer UDP checksum for encapsulated packets,
fix that.
Fixes: 837052d0ccc5 ('net/mlx4_en: Add netdev support for TCP/IP
offloads of vxlan tunneling')
Signed-off-by: Or Gerlitz <ogerlitz@xxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/ethernet/mellanox/mlx4/en_tx.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
--- a/drivers/net/ethernet/mellanox/mlx4/en_tx.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_tx.c
@@ -808,8 +808,11 @@ netdev_tx_t mlx4_en_xmit(struct sk_buff
tx_desc->ctrl.fence_size = (real_size / 16) & 0x3f;
tx_desc->ctrl.srcrb_flags = priv->ctrl_flags;
if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
- tx_desc->ctrl.srcrb_flags |= cpu_to_be32(MLX4_WQE_CTRL_IP_CSUM |
- MLX4_WQE_CTRL_TCP_UDP_CSUM);
+ if (!skb->encapsulation)
+ tx_desc->ctrl.srcrb_flags |= cpu_to_be32(MLX4_WQE_CTRL_IP_CSUM |
+ MLX4_WQE_CTRL_TCP_UDP_CSUM);
+ else
+ tx_desc->ctrl.srcrb_flags |= cpu_to_be32(MLX4_WQE_CTRL_IP_CSUM);
ring->tx_csum++;
}
Patches currently in stable-queue which might be from ogerlitz@xxxxxxxxxxxx are
queue-3.17/net-mlx4_en-don-t-attempt-to-tx-offload-the-outer-udp-checksum-for-vxlan.patch
queue-3.17/mlx4-avoid-leaking-steering-rules-on-flow-creation-error-flow.patch
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